If you head on over to Google's factory image site, you'll find brand-new images based on the incremental update to Android 4.2.1. The devices with factory images currently available include the Nexus 7, Nexus 7 3G, Galaxy Nexus (takju, yakju), and Nexus 4. The 4.2.1 image for the Nexus 10 has been delayed, according to JBQ, due to an issue with JOP40C not being flashable over older builds. This has since been fixed, and you can download the new 4.2 factory image for the Nexus 10, though it's still build JOP40C.

If you just can't wait for the 4.2.1 update to arrive on your Nexus 7 or Nexus 10 (Nexus 4 is here), it's your lucky day. The update URL has been uncovered so you can manually update the device right now.

Just grab the matching file below, both of which clock in at a slim ~1MB. The main fix in this build is for the now-famous December People app bug.

Android 4.2.1 along with its source were released today, but outside of the December bug in the People app, it wasn't immediately apparent whether it contained other fixes and improvements or not. The list of files touched by the Nexus 4 OTA was extensive, but now thanks to developer Al Sutton, we can confirm that most of those were probably just minor edits to bump the version number.

According to Al and his handy AOSP diff script, here are the only changes in Android 4.2.1 (4.2.1_r1) open source code compared to Android 4.2 (4.2_r1).

Earlier today, both the Nexus 4 and the Nexus 10 started receiving small ~1MB OTAs to Android 4.2.1 with fixes to the missing month of December in the People app, among other things. The corresponding open source files are being pushed by Google to the Android Open Source Project (AOSP) as we speak, Android release engineer Jean-Baptiste Queru just announced in the Android Building group.

If you're looking for the Android 4.2.1 update to the Nexus 4 that started rolling out this morning (it's a very minor patch, at only 1.1MB), you can find it, straight from Google's servers, at this link.

The update, JOP40D, so far has one known fix: the missing month of December in the People app (Contacts.apk). Presumably it fixes other things, too - Google probably wouldn't release a patch just for a single bug, but we haven't figured out what else this patch may address just yet.

Earlier this month, we reported on a pretty big omission in Android 4.2's People app: Google forgot December. So, any birthdays, anniversaries, or other important dates you may have needed to note for that month were simply impossible to document. Now, though, it looks like El Goog is fixing that issue with a small 1.1MB update. This OTA is, of course, labeled as Android 4.2.1, and aside from the December fix, we're not sure of what else it may bring.

Netflix has been gently updating and adding features ever since it debuted on Android, and while today's addition isn't earth-shattering, it'll be welcome to anyone with a shiny new Nexus device. The primary addition to the 2.1 update is full support for Android 4.2, but the player UI has also gotten a pretty big facelift. Bigger buttons and more transparent elements make it a lot easier to pinpoint tracking, and the whole thing seems at least superficially faster.

Since Android 4.2 introduced native lockscreen widgets, we've seen several devs already push out updates to their apps with support for the feature. The latest to do so is LevelUp Studio, which updated its Twitter client Plume. This is actually my personal favorite when it comes to Twitter clients on Android, especially for tablets. So I was pretty glad to see the 4.2 lockscreen widget show up.

The update also brings a few other fixes and enhancements to the app:

- add a lockscreen widget on Android 4.2- fix the widget context on Android 4.2- fix the display of the DM recipient- fix Facebook timeline not updating in some case- fix unread list item appearing multiple times- improve the picture cache coherence- make Halloween notification sound available all the time

Plume is, of course, a free app in the Play Store, though there's also a $5 premium version available for those who prefer an ad-free experience.

About a week after the Takju variant of Samsung's Galaxy Nexus got its 4.2 update, it looks like the same is rolling out to the Nexus' Yakju variant. The update (build JOP40C), for those not willing to wait, is also available for manual download and flashing (check the link below).

It should be noted that this update is meant solely for the Galaxy Nexus Yakju – that's the international version not from the Play Store – and your device should be running build JZO54K before you try to install the update.